Shared PRB Self-Scheduling for NTN Contention Reduction

Solution Overview

Problem

The conventional scheduling mechanisms in Non-Terrestrial Networks (NTN) suffer from large propagation delays and contention issues in contention-based data transmission (CBDT), leading to inefficient resource allocation and user experience degradation.

Innovation Solution

A method where User Equipment (UE) determines Modulation and Coding Scheme (MCS), number of PRBs, and transport block size for CBDT, self-scheduling shared PRBs based on network assistance and measurement parameters, and sends self-scheduling information to the network device to minimize contention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional scheduling mechanism is used in NTN, then resource allocation is simple, but large propagation delays cause scheduling inefficiency and poor user experience

Engineering Contradiction:

Improvescheduling efficiencyVSAvoidpropagation delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-configuring a set of candidate PRBs and MCS values for CBDT before actual data transmission. The UE and network device prepare resource selection criteria and contention resolution parameters in advance, enabling faster resource allocation decisions during transmission without requiring complex real-time scheduling calculations, thus reducing propagation delay impact.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements self-service by enabling the UE to autonomously determine MCS, select PRBs from the pre-configured set, and perform self-scheduling for CBDT. The UE independently calculates transport block size, determines resource requirements, and executes transmission without requiring continuous network scheduling commands, thereby improving scheduling efficiency and reducing delays.

Inventive Principle:

Principle #25Self-service

2Productivity

If shared resource mechanism is used for CBDT, then resource utilization is improved, but contention between multiple UEs increases

Engineering Contradiction:

Improveresource utilizationVSAvoidcontention resolution

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-configuring a set of candidate PRBs and MCS values for CBDT before actual data transmission. The UE and network device prepare resource selection criteria and contention resolution parameters in advance, enabling faster resource allocation decisions during transmission without requiring complex real-time scheduling calculations, thus reducing propagation delay impact.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by establishing a contention resolution mechanism where the network device receives feedback from multiple UEs about their resource selection intentions. The network uses this feedback information to resolve contentions and allocate PRBs fairly, ensuring reliable resource distribution while maintaining high resource utilization efficiency.

Inventive Principle:

Principle #23Feedback

3Device complexity

If UE determines MCS and selects PRBs autonomously, then scheduling complexity is reduced, but resource allocation optimization may be compromised

Engineering Contradiction:

Improvescheduling complexityVSAvoidresource allocation optimization

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by pre-configuring a set of candidate PRBs and MCS values for CBDT before actual data transmission. The UE and network device prepare resource selection criteria and contention resolution parameters in advance, enabling faster resource allocation decisions during transmission without requiring complex real-time scheduling calculations, thus reducing propagation delay impact.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements parameter changes by allowing the UE to dynamically adjust MCS index and PRB selection from a pre-configured set based on current channel conditions and data requirements. The UE changes parameters such as transport block size and modulation scheme to optimize resource allocation while maintaining relatively simple autonomous decision-making logic.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12471124B2Method and system for resource selection and contention resolution in shared resource mechanism

Publication Date: 2025.11.11 SAMSUNG ELECTRONICS CO LTD

AI summary

Embodiments of the disclosure provide a method for scheduling shared physical resource blocks (PRBs) by a user equipment (UE) in a wireless network and minimizing/reducing contention on the shared PRBs. The method includes: receiving PRBs from a network device, where the PRBs are shared among multiple UEs in the wireless network; detecting data at the UE for transmission; determining a modulation and coding scheme (MCS), a number of PRBs, and a size of a transport block required for data transmission in response to detecting the data; self-scheduling the shared PRBs based on at least one of the determined MCS, the number of PRBs, and the size of the transport block; and sending the data based on the self-scheduling along with self-scheduling information to the network device.